Kathleen O'Sullivan

Appeals, Issues & Strategy

Litigation

Class-Action Defense

E-Discovery Services & Strategy

Trade Secrets

Trial Practice

Food & Beverage

Food & Consumer Packaged Goods Litigation

Retail & Consumer Products

Digital Media & Entertainment, Gaming & Sports

With more than 30 years of practice, Katie O'Sullivan represents businesses facing high-stakes litigation, including trial court cases and appeals. She regularly advises Fortune 100 and other leading companies across industries in consumer class actions, pending investigations, and other related cases. Katie also works on appeals across a broad spectrum of legal issues, including antitrust, contracts and business torts, environmental law, product labeling, privacy, and product liability.

Katie emphasizes high-quality written and oral advocacy in her litigation practice and as a leader in the firm. Katie served as the chair of the firm's Executive Committee from 2020 through 2024, during which time she led the development of the firm's strategic plan. She is also the former firmwide chair of the Commercial Litigation practice.

Katie is an active member of the legal community and has served on the Washington State Bar Association Board of Governors and chaired the Washington State Commission on Judicial Conduct. Katie currently serves on the American Law Institute Council and the Ninth Judicial Circuit Historical Society board. She is a former chair of the Board of Directors of the YMCA of Greater Seattle.